Question 1
The director of a hospital wishes to estimate the mean number of people who are admitted to the emergency room during a
period. The director randomly selects 49 different
periods and determines the number of admissions for each. For this sample,
and
Estimate the mean number of admissions per
period with a 90% confidence interval.
◦ 17.2 ± .168
◦ 17.2 ± 5.875
◦ 17.2 ± 1.175
◦ 17.2 ± .643
Question 2
Suppose a large labor union wishes to estimate the mean number of hours per month a union member is absent from work. The union decides to sample 348 of its members at random and monitor the working time of each of them for 1 month. At the end of the month, the total number of hours absent from work is recorded for each employee. If the mean and standard deviation of the sample are
hours and
hours, find a 99% confidence interval for the true mean number of hours a union member is absent per month. Round to the nearest thousandth.
◦ 7.5 ± .186
◦ 7.5 ± .483
◦ 7.5 ± .026
◦ 7.5 ± .258
Aerial and close-up views of a large biodiversity experiment in Cedar Creek, Minnesota. Each of the
Managing large bands of grazing animals requires detailed knowledge of local landscapes, especially
The Very Large Array (VLA)
graphic(04-40.jpg) Mary pushes horizontally on a large, heavy table which is s